The Century Co.
Copyright, 1919, by
The Century Co.
Copyright, 1917, 1918, 1919, by
The Independent Corporation
Published, October, 1919



[Illustration: From "America's Munitions"



THE PRODUCTION OF NEW AND STRONGER FORMS OF STEEL IS ONE OF THE GREATEST
TRIUMPHS OF MODERN CHEMISTRY

The photograph shows the manufacture of a 12-inch gun at the plant of
the Midvale Steel Company during the late war. The gun tube, 41 feet
long, has just been drawn from the furnace where it was tempered at
white heat and is now ready for quenching.]




TO MY FIRST TEACHER

PROFESSOR E.H.S. BAILEY OF THE UNIVERSITY OF KANSAS

AND MY LAST TEACHER